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/*
Unix SMB/CIFS implementation.
dcerpc utility functions
Copyright (C) Andrew Tridgell 2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/*
this ndr_size_* stuff should really be auto-generated ....
*/
static size_t ndr_size_epm_floor(struct epm_floor *fl)
{
size_t ret = 5;
if (fl->lhs.protocol == EPM_PROTOCOL_UUID) {
ret += 18;
} else {
ret += fl->lhs.info.lhs_data.length;
}
ret += fl->rhs.rhs_data.length;
return ret;
}
size_t ndr_size_epm_towers(struct epm_towers *towers)
{
size_t ret = 2;
int i;
for (i=0;i<towers->num_floors;i++) {
ret += ndr_size_epm_floor(&towers->floors[i]);
}
return ret;
}
/*
work out what TCP port to use for a given interface on a given host
*/
NTSTATUS dcerpc_epm_map_tcp_port(const char *server,
const char *uuid, unsigned version,
uint32 *port)
{
struct dcerpc_pipe *p;
NTSTATUS status;
struct epm_Map r;
struct policy_handle handle;
GUID guid;
struct epm_twr_t twr, *twr_r;
status = dcerpc_pipe_open_tcp(&p, server, 135);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
/* we can use the pipes memory context here as we will have a short
lived connection */
status = dcerpc_bind_byuuid(p, p->mem_ctx,
DCERPC_EPMAPPER_UUID,
DCERPC_EPMAPPER_VERSION);
if (!NT_STATUS_IS_OK(status)) {
dcerpc_pipe_close(p);
return status;
}
ZERO_STRUCT(handle);
ZERO_STRUCT(guid);
twr.towers.num_floors = 5;
twr.towers.floors = talloc(p->mem_ctx, sizeof(twr.towers.floors[0]) * 5);
/* what I'd like for christmas ... */
/* an RPC interface ... */
twr.towers.floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
GUID_from_string(uuid, &twr.towers.floors[0].lhs.info.uuid.uuid);
twr.towers.floors[0].lhs.info.uuid.version = version;
twr.towers.floors[0].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
/* encoded with NDR ... */
twr.towers.floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
GUID_from_string(NDR_GUID, &twr.towers.floors[1].lhs.info.uuid.uuid);
twr.towers.floors[1].lhs.info.uuid.version = 2;
twr.towers.floors[1].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
/* on an RPC connection ... */
twr.towers.floors[2].lhs.protocol = EPM_PROTOCOL_RPC_C;
twr.towers.floors[2].lhs.info.lhs_data = data_blob(NULL, 0);
twr.towers.floors[2].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
/* on a TCP port ... */
twr.towers.floors[3].lhs.protocol = EPM_PROTOCOL_TCP;
twr.towers.floors[3].lhs.info.lhs_data = data_blob(NULL, 0);
twr.towers.floors[3].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
/* on an IP link ... */
twr.towers.floors[4].lhs.protocol = EPM_PROTOCOL_IP;
twr.towers.floors[4].lhs.info.lhs_data = data_blob(NULL, 0);
twr.towers.floors[4].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 4);
r.in.object = &guid;
r.in.map_tower = &twr;
r.in.entry_handle = &handle;
r.in.max_towers = 1;
r.out.entry_handle = &handle;
status = dcerpc_epm_Map(p, p->mem_ctx, &r);
if (!NT_STATUS_IS_OK(status)) {
dcerpc_pipe_close(p);
return status;
}
if (r.out.status != 0 || r.out.num_towers != 1) {
dcerpc_pipe_close(p);
return NT_STATUS_PORT_UNREACHABLE;
}
twr_r = r.out.towers[0].twr;
if (!twr_r) {
dcerpc_pipe_close(p);
return NT_STATUS_PORT_UNREACHABLE;
}
if (twr_r->towers.num_floors != 5 ||
twr_r->towers.floors[3].lhs.protocol != EPM_PROTOCOL_TCP ||
twr_r->towers.floors[3].rhs.rhs_data.length != 2) {
dcerpc_pipe_close(p);
return NT_STATUS_PORT_UNREACHABLE;
}
*port = RSVAL(twr_r->towers.floors[3].rhs.rhs_data.data, 0);
dcerpc_pipe_close(p);
return NT_STATUS_OK;
}
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